MsiInstallProduct InstallUserExit

[BigAlbert]

I'm trying to use MsiInstallProduct to execute Msi installation. Basically, it should be rather simple
[DllImport("msi.dll")]
public static extern int MsiInstallProduct(string packagePath, string commandLine);
I've tried almost any option:
InstallMsi("C:\\MyInstall.msi", "ACTION=INSTALL CLIENTUILEVEL=3")
InstallMsi("C:\\MyInstall.msi", "")
InstallMsi("C:\\MyInstall.msi", "CLIENTUILEVEL=3")

but still, I'm keep having InstallUserExit (1602) as result.

Any guess?

[MichaelU]

Is your launcher elevated? I think UAC timeouts or suppressed UAC prompts become cancels, and cancels become a 1602.

[BigAlbert]

I'm running on WinXp and I'm defined as Administrator on the machine..